<html>
<head>
	<title>树状图-左右放射</title>
</head>
<body>
<script src="d3/d3.v3.min.js" charset="utf-8"></script>
<style type="text/css">
#body{
	height: 500px;
	width: 500px;
}
/*d3js*/
.node circle {
	cursor: pointer;
	fill: #fff;
	stroke: steelblue;
	stroke-width: 1.5px;
}

.node text {
	font-size: 11px;
	cursor: pointer;
}

path.link {
	fill: none;
	stroke: #ccc;
	stroke-width: 1.5px;
}

</style>

<div id="body" class="body">
	<div id="footer">
		<button onclick="updateinfo()">Click me</button>
	</div>
</div>

<script type="text/javascript">
/*介绍下过程：

使用d3.js
初始化d3和画布大小，tree = d3.layout.cluster().size([h, w])
导入数据，使用d3默认处理数据： root = tree.nodes(data)
处理数据（包括坐标的处理）
展示数据*/


updateinfo();

function updateinfo(){
	var json ={"r":{"name":"flare","children":[{"name":"animate","children":[{"name":"Easing"},{"name":"FunctionSequence"},{"name":"ISchedulable"},{"name":"Parallel"},{"name":"Parallel2"},{"name":"Parallel4"},{"name":"Parallel6"},{"name":"Pause"}]}]},"l":{"name":"flare","children":[{"name":"query","children":[{"name":"AggregateExpression","pos":"l"},{"name":"And","pos":"l"},{"name":"Arithmetic","pos":"l"},{"name":"fasdfasdf","pos":"l"},{"name":"Arithmasdfasetic","pos":"l"},{"name":"dfasdfa","pos":"l"}],"pos":"l"}]}};
	var d3js = function(json){
			var objRight = json['r'] ? json['r'] : {};
			var objLeft  = json['l'] ? json['l'] : {};
			d3jsTree('#body',objRight,objLeft);
		}
	d3js(json);
}

// d3js tree
function d3jsTree(aim,objRight,objLeft){
    // $(aim+' svg').remove();
    var m = [20, 120, 20, 120],
        w = 1280 - m[1] - m[3],
        h = 600 - m[0] - m[2],  //靠左
        i = 0;

    var tree = d3.layout.cluster().size([h, w]);

    var diagonal = d3.svg.diagonal().projection(function(d) { return [d.y, d.x]; });

    var vis = d3.select(aim).append("svg:svg")
                .attr("width", 1200)
                .attr("height", h + m[0] + m[2])
                .append("svg:g")
                .attr("transform", "translate(" + h + "," + m[0] + ")"); // translate(靠左，靠上)
    
    update(objRight,objLeft);

    function init_nodes(left){
        left.x0 = h / 2;
        left.y0 = 0;
        var nodes_dic = [];
        var left_nodes = tree.nodes(left);
        return left_nodes;
    }

    function update(source,l) {
        var duration = d3.event && d3.event.altKey ? 5000 : 500;

        // Compute the new tree layout.
        var nodes = init_nodes(source);
        var left_nodes = init_nodes(l);
        // if( l !=)
        var len = nodes.length;
        for( var i in left_nodes ){
            nodes[len++] = left_nodes[i];
        }

        // Normalize for fixed-depth.
        nodes.forEach(function(d) {
            tmp = 1;
            if( d.pos == 'l' ){ tmp = -1;}
            d.y = tmp * d.depth * 200;  // 线条长度，也是作于方向
            // d.x = d.l * 63;
        });

        // Update the nodes…
        var node = vis.selectAll("g.node")
            .data(nodes, function(d) { return d.id || (d.id = ++i); });

        // Enter any new nodes at the parent's previous position.
        var nodeEnter = node.enter().append("svg:g")
            .attr("class", "node")
            .attr("transform", function(d) { return "translate(" + source.y0 + "," + source.x0 + ")"; })
//          .on("click", function(d) { alert(d.name); }); // 点击事件
               .on("click", function(d) { console.log(d);toggle(d); update(d,l); });//展开和收起

        nodeEnter.append("svg:circle")
            .attr("r", 1e-6)
            .style("fill", function(d) { return d._children ? "lightsteelblue" : "#fff"; });

        nodeEnter.append("svg:text")
            .attr("x", function(d) { return d.children || d._children ? -10 : 10; })
            .attr("dy", ".35em")
            .attr("text-anchor", function(d) { return d.children || d._children ? "end" : "start"; })
            .text(function(d) { return d.name; })
            .style("fill-opacity", 1e-6);

        // Transition nodes to their new position.
        var nodeUpdate = node.transition()
            .duration(duration)
            .attr("transform", function(d) { return "translate(" + d.y + "," + d.x + ")"; });

        nodeUpdate.select("circle")
            .attr("r", 4.5)
            .style("fill", function(d) { return d._children ? "lightsteelblue" : "#fff"; });

        nodeUpdate.select("text").style("fill-opacity", 1);

        // Transition exiting nodes to the parent's new position.
        var nodeExit = node.exit().transition()
                            .duration(duration)
                            .attr("transform", function(d) { return "translate(" + source.y + "," + source.x + ")"; })
                            .remove();

        nodeExit.select("circle")
            .attr("r", 1e-6);

        nodeExit.select("text")
            .style("fill-opacity", 1e-6);

        // Update the links…
        var link = vis.selectAll("path.link")
                    .data(tree.links(nodes), function(d) { return d.target.id; });

        // Enter any new links at the parent's previous position.
        link.enter()
            .insert("svg:path", "g")
            .attr("class", "link")
            .attr("d", function(d) {
                var o = {x: source.x0, y: source.y0};
                return diagonal({source: o, target: o});
            })
            .transition()
            .duration(duration)
            .attr("d", diagonal);

        // Transition links to their new position.
        link.transition()
            .duration(duration)
            .attr("d", diagonal);

        // Transition exiting nodes to the parent's new position.
        link.exit()
            .transition()
            .duration(duration)
            .attr("d", function(d) {
                var o = {x: source.x, y: source.y};
                return diagonal({source: o, target: o});
            })
            .remove();

        // Stash the old positions for transition.
        nodes.forEach(function(d) {
            d.x0 = d.x;
            d.y0 = d.y;
        });
    }

    // Toggle children.
    function toggle(d) {
        if (d.children) {
            d._children = d.children; // 闭合子节点
            d.children = null;
        } else {
            d.children = d._children; // 开启子节点
            d._children = null;
        }
    }
}
</script>
</body>
</html>